Run results for: className.indexOf vs. classList.contains 1

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:94.0) Gecko/20100101 Firefox/94.0

Browser: Firefox 94

Operating system: Mac OS X 10.15

Device Platform: Desktop

Date tested: 3 years ago

Test name	Executions per second
className	16230599.0 Ops/sec
classList	708135616.0 Ops/sec

HTML Preparation code:

<div id="foo" class="test"></div>

AخA
 
<div id="foo" class="test"></div>

Script Preparation code:

var element = document.getElementById("foo");

 
var element = document.getElementById("foo");

Tests:

className
element.className.indexOf("test")
element.className.indexOf("test")
classList
element.classList.contains("test");
element.classList.contains("test");